<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>CSS的常用属性</title>
    <style>
        div {
            background-color: red;
            height: 100px;
            visibility: hidden;
        }
    </style>
</head>
<body>
    <div>我是div</div>
    <p>我是p标签</p>
</body>
</html>